Schneider Electric TM3DI16 Modicon Digital Input Module

Name: Schneider Electric TM3DI16 I/O Module – Datasheet & Quote
Brand: Schneider Electric

Description

Overview

The Schneider Electric TM3DI16 is a 16-channel digital input expansion module for the Modicon TM3 range, extending the I/O count of Modicon M221, M241, and M251 controllers without requiring a separate rack or backplane. It gives panel builders a compact, cost-effective way to add discrete sensing points as machine designs grow beyond the controller’s onboard I/O.

With fast quotation turnaround and technical support, Seven Star LLC proudly supplies the Schneider Electric TM3DI16 across the Sultanate of Oman and the wider GCC. Every unit is supplied with manufacturer documentation and local technical backing, giving procurement teams in Muscat, Sohar, and Salalah a formal quotation and support with selection. Seven Star LLC has a dedicated instrumentation and controls division that provides technical support with selection and specification for the Schneider Electric TM3DI16 and the wider Schneider Electric portfolio.

Operating Principle

The TM3DI16 reads sixteen discrete field signals – from limit switches, proximity sensors, pushbuttons, and relay contacts – and converts each into a digital status bit that is transferred to the host controller over the internal TM3 bus on every scan cycle. Optically isolated input circuitry protects the controller’s backplane electronics from field-side voltage transients and wiring faults.

Because the module clips directly onto the Modicon base controller or an adjacent TM3 module, no separate power supply, addressing, or network configuration is required; the host automatically recognizes the module and maps its channels into the controller’s I/O table at power-up. Diagnostic LEDs on the module face mirror each channel’s live state, letting technicians verify field wiring without a programming laptop.

Engineering Design of the Schneider Electric TM3DI16

The Schneider Electric TM3DI16 is housed in a compact DIN-rail-mount enclosure that clips directly to the side of a Modicon M221, M241, or M251 base unit, extending the control assembly horizontally with no additional wiring for power or data. Removable spring or screw terminal blocks allow field wiring to be pre-assembled and swapped without disturbing the module itself.

Each of the sixteen channels is individually fused and optically isolated, with per-channel status LEDs on the front face for at-a-glance diagnostics during commissioning and troubleshooting. The module’s keyed backplane connector prevents incorrect installation and ensures reliable data transfer to the host controller.

Key Features

The Schneider Electric TM3DI16 is engineered to deliver dependable performance in demanding industrial and commercial environments. Key features include:

Sixteen optically isolated digital input channels for reliable field signal acquisition.
Direct clip-on mounting to Modicon M221, M241, and M251 controllers with no separate backplane.
Automatic recognition and I/O table mapping at power-up with no manual addressing.
Per-channel status LEDs for fast on-site diagnostics during commissioning and troubleshooting.
Removable terminal blocks for pre-wired panel assembly and simplified module replacement.
Compact DIN-rail footprint that keeps panel dimensions to a minimum.
Wide input voltage compatibility for standard 24VDC sensor and switch wiring.
Robust industrial rating suited to the temperature and vibration conditions of GCC plant environments.

Applications

The Schneider Electric TM3DI16 is used wherever a Modicon-based machine or skid needs additional discrete input capacity beyond the controller’s embedded I/O, such as conveyor position sensing, valve and pump status monitoring, and safety interlock wiring. It is a common line item on panel builds supplied to water treatment, food processing, and utility facilities across Oman and the GCC.

With engineering support in Muscat, Seven Star LLC distributes the Schneider Electric TM3DI16 to system integrators, panel builders, and EPC contractors throughout Oman and the GCC, supporting district cooling plants, desalination facilities, oil and gas installations, commercial towers, hospitality developments, and the Sohar and Salalah economic zones. Local availability shortens lead times against direct import, and Seven Star LLC’s engineering team assists with product selection, coordination with the wider Schneider Electric ecosystem, and post-installation support so operators in the region are never left waiting on a factory response from overseas.

Technical Specifications

The table below summarizes the key technical specifications of the Schneider Electric TM3DI16 for engineering reference and system design.

Parameter	Specification
Model	TM3DI16
Type	Digital input expansion module
Channels	16 digital inputs
Isolation	Optically isolated per channel
Compatibility	Modicon M221 / M241 / M251
Mounting	35mm DIN rail, clip-on to base controller
Supply Voltage	24VDC
Diagnostics	Per-channel status LEDs

Why Choose Seven Star LLC

Seven Star LLC supplies the Schneider Electric TM3DI16 and the broader Schneider Electric catalogue to industrial, commercial and utility customers across Oman and the GCC.Seven Star LLC supplies this item on request with the manufacturer documentation, and availability and lead time are confirmed at quotation.

Get a Quote

To request a formal quotation for the Schneider Electric TM3DI16, contact the Seven Star LLC instrumentation and controls division directly. Seven Star LLC supplies on request across Oman and the GCC, offers downloadable technical datasheets for engineering review, and provides pre-sales application support for panel builders and end users alike. Seven Star LLC supplies the Schneider Electric TM3DI16 with technical documentation and responsive local support – reach out today to confirm availability, lead time, and pricing for your project.

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About brand

Schneider Electric is the French group for energy management and industrial automation: low and medium voltage switchgear and circuit breakers, motor control, drives, PLCs, power monitoring, UPS systems and building management. Its history goes back to 1836, when the brothers Adolphe and Eugène Schneider took over the iron and steel works at Le Creusot in Burgundy. Over the 20th century the company left steel and heavy engineering and became an electrical group through acquisitions such as Merlin Gerin, Télémécanique, Square D and Modicon. Its head office is in Rueil-Malmaison near Paris, and its shares are listed on Euronext Paris.

Schneider Electric company profile

Origins	1836, Le Creusot, France: Adolphe and Eugène Schneider take over the Le Creusot foundry
Headquarters	Rueil-Malmaison (Paris region), France
Ownership	Public company listed on Euronext Paris
Key acquisitions	Télémécanique (1988), Square D (1991), Merlin Gerin (1992), Modicon (1997), APC (2007), Invensys (2014); majority owner of AVEVA software
Brand names still in use	Acti9, ComPacT and MasterPacT breakers, TeSys motor control, Altivar drives, Altistart soft starters, Modicon PLCs, Harmony control components, PowerLogic and Easergy protection and metering, APC UPS, EcoStruxure software platform
Product families	Low voltage distribution, medium voltage switchgear and protection relays, motor control and drives, PLCs and HMIs, power meters, UPS and cooling, enclosures, building automation and energy software

Milestones

1836: The Schneider brothers acquire the Le Creusot works; the business grows in steel, locomotives and heavy engineering.
1975: First investment in Merlin Gerin, a French maker of electrical distribution equipment.
1988–1992: Télémécanique, Square D (USA) and Merlin Gerin join the group, making it an electrical specialist.
1997: Modicon, the company behind the first programmable logic controller, joins the group.
1999: The group takes the name Schneider Electric.
2007 and 2014: APC (UPS and data centre power) and Invensys (process automation) are acquired.

Choosing Schneider Electric breakers and motor control

Circuit breakers are chosen by current and breaking capacity. Acti9 miniature circuit breakers (iC60, C120) protect final circuits up to 125 A. ComPacT NSX molded case breakers cover about 16 to 630 A, and the letter after the frame size sets the breaking capacity: B, F, N, H, S, L from lowest to highest. MasterPacT air circuit breakers are used as main incomers on large switchboards. For motors, a TeSys contactor with an LRD overload relay or a GV2 motor circuit breaker suits direct starting, an Altistart soft starter reduces starting current, and an Altivar drive controls speed. The breaking capacity must always be at least the prospective short-circuit current at the point of installation.

Where Schneider Electric products are used

In Oman and the GCC, Schneider Electric equipment is found in main and sub-main switchboards of commercial and residential buildings, motor control centres in water, oil and gas and industrial plants, substations protected by Sepam and Easergy relays, data centres powered by Galaxy and APC UPS systems, and buildings controlled by EcoStruxure Building Operation.

APC by Schneider Electric: UPS and critical power

Since 2007, APC has been part of Schneider Electric and is now its product brand for uninterruptible power supplies, replacement batteries, battery packs, network management cards and rack power distribution. Our APC catalogue covers Smart-UPS line-interactive and on-line models, Easy UPS On-Line, the modular Symmetra LX, RM and PX ranges, Silcon three-phase systems and their spare part kits, and the RBC cartridges that keep them running. Schneider Electric breakers, drives and PLCs can be quoted together with APC UPS systems in one request.

Schneider Electric products we list

Family	Examples
Circuit breakers	Acti9 iC60N, C120N, NSX100F, NSX250N, NSX630, EasyPact EZC, MasterPacT MTZ1, MasterPacT NW
Motor control	TeSys Deca LC1D, TeSys F, LRD overload relay, GV2ME08, Altistart 22, Altistart 480
Drives	Altivar 12, Altivar 320, ATV340, Altivar Process 630, ATV930, Lexium 32 servo
PLCs, HMIs and relays	Modicon M221, M241, M580 BMEP582040, Zelio Logic, Magelis HMISTU655
Protection, metering and power	Sepam series 20, Easergy P3U30, MiCOM P139, PM5560, iEM3255, Galaxy VS UPS

Ordering Schneider Electric products: what we need

Send the commercial reference from the label (for example LC1D18M7 or ATV320U22N4C). For breakers, confirm the rated current, number of poles, breaking capacity and trip unit. For contactors, give the coil voltage. For drives, give the motor power and supply voltage. APC products are listed on their own brand page.

Facts checked against Schneider Electric's published company history, October 2026.

Browse Schneider Electric products by category: Circuit Breaker, Electrical & Power Modules, AC Drives, PLC & I/O Cards, Metering Systems, UPS and Batteries.

FAQ

Questions about the Schneider Electric TM3DI16 Modicon Digital Input

Answers from our engineering team on installation, compatibility and integration.

01What is the TM3DI16 used for?

It is a 16-point digital input expansion module used to add sensing capacity to Modicon M221/M241 logic controllers.

02Which controllers is the TM3DI16 compatible with?

It is designed for direct mounting and automatic recognition by Modicon M221 and M241 series controllers.

03What voltage does the TM3DI16 accept?

The module accepts 24 VDC sink/source digital input signals across its 16 channels.

04Does the TM3DI16 have removable terminals?

Yes, it features removable screw or spring terminal blocks for fast field wiring and maintenance.

05Can Seven Star LLC supply Modicon TM3 modules in Oman?

Yes, Seven Star LLC is a trusted supplier of Schneider Electric products stocking and supplying TM3 I/O modules across Oman and the GCC.